def evalDiode():
datalist = loadCSVToList('../data/part1/Kennlinie.txt')
data = DataErrors()
U0 = datalist[0][1]
sU0 = 0.05 + 0.01 * U0
for I, u in datalist:
U = u - U0
su = 5 + 0.01 * u
sU = sqrt(su**2 + sU0**2)
data.addPoint(I, U, 0.1, sU)
xmin, xmax = 53, 71.5
c = TCanvas('c_diode', '', 1280, 720)
g = data.makeGraph('g_diode', "Laserstrom I_{L} / mA",
"Photodiodenspannung U_{ph} / mV")
g.GetXaxis().SetRangeUser(-5, 90)
g.SetMinimum(-50)
g.SetMaximum(1400)
g.Draw('APX')
# y=0 line
line = TLine(-5, 0, 90, 0)
line.SetLineColor(OPData.CH2ECOLOR)
line.Draw()
data.filterX(xmin, xmax)
g2 = data.makeGraph('g_diode_2', "Laserstrom I_{L} / mA",
"Photodiodenspannung U_{ph} / mV")
g2.SetMarkerColor(OPData.CH1COLOR)
g2.SetLineColor(OPData.CH1COLOR)
fit = Fitter('fit_diode', '[0] * (x-[1])')
fit.function.SetNpx(1000)
fit.setParam(0, 'a', 1)
fit.setParam(1, 'I_{th}', 50)
fit.fit(g2, 40, 77)
fit.saveData('../fit/part1/kennlinie.txt')
l = TLegend(0.15, 0.55, 0.4, 0.85)
l.SetTextSize(0.03)
l.AddEntry(g, 'Laserdiodenkennlinie', 'p')
l.AddEntry(g2, 'Ausschnitt zum Fitten', 'p')
l.AddEntry(fit.function, 'Fit mit U_{ph} = a (I_{ L} - I_{ th} )', 'l')
fit.addParamsToLegend(l, (('%.1f', '%.1f'), ('%.2f', '%.2f')),
chisquareformat='%.2f',
units=['mV/mA', 'mA'])
l.Draw()
g.Draw('P')
g2.Draw('P')
c.Update()
c.Print('../img/part1/diodenkennlinie.pdf', 'pdf')
def evalDiode():
datalist = loadCSVToList('../data/part1/Kennlinie.txt')
data = DataErrors()
U0 = datalist[0][1]
sU0 = 0.05 + 0.01 * U0
for I, u in datalist:
U = u - U0
su = 5 + 0.01 * u
sU = sqrt(su ** 2 + sU0 ** 2)
data.addPoint(I, U, 0.1, sU)
xmin, xmax = 53, 71.5
c = TCanvas('c_diode', '', 1280, 720)
g = data.makeGraph('g_diode', "Laserstrom I_{L} / mA", "Photodiodenspannung U_{ph} / mV")
g.GetXaxis().SetRangeUser(-5, 90)
g.SetMinimum(-50)
g.SetMaximum(1400)
g.Draw('APX')
# y=0 line
line = TLine(-5, 0, 90, 0)
line.SetLineColor(OPData.CH2ECOLOR)
line.Draw()
data.filterX(xmin, xmax)
g2 = data.makeGraph('g_diode_2', "Laserstrom I_{L} / mA", "Photodiodenspannung U_{ph} / mV")
g2.SetMarkerColor(OPData.CH1COLOR)
g2.SetLineColor(OPData.CH1COLOR)
fit = Fitter('fit_diode', '[0] * (x-[1])')
fit.function.SetNpx(1000)
fit.setParam(0, 'a', 1)
fit.setParam(1, 'I_{th}', 50)
fit.fit(g2, 40, 77)
fit.saveData('../fit/part1/kennlinie.txt')
l = TLegend(0.15, 0.55, 0.4, 0.85)
l.SetTextSize(0.03)
l.AddEntry(g, 'Laserdiodenkennlinie', 'p')
l.AddEntry(g2, 'Ausschnitt zum Fitten', 'p')
l.AddEntry(fit.function, 'Fit mit U_{ph} = a (I_{ L} - I_{ th} )', 'l')
fit.addParamsToLegend(l, (('%.1f', '%.1f'), ('%.2f', '%.2f')), chisquareformat='%.2f', units=['mV/mA', 'mA'])
l.Draw()
g.Draw('P')
g2.Draw('P')
c.Update()
c.Print('../img/part1/diodenkennlinie.pdf', 'pdf')
